Patents by Inventor Michihiro MURAMOTO

Michihiro MURAMOTO has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Magnetic material for antennas, antenna, and wireless communication device
    Patent number: 9424968
    Abstract: A magnetic material for antennas including: an M-type hexagonal ferrite represented by the following general formula (1) as a main phase, MA.Fe12-x.MBx.O19 (wherein MA is at least one kind selected from the group consisting of Sr and Ba, MB is MC or MD, MC is at least one kind selected from the group consisting of Al, Cr, Sc and In, MD is an equivalent mixture of at least one kind selected from the group consisting of Ti, Sn and Zr and at least one kind selected from the group consisting of Ni, Zn, Mn, Mg, Cu and Co, X is a number from 1 to 5), and an average crystal particle diameter is equal to or greater than 5 ?m.
    Type: Grant
    Filed: January 17, 2012
    Date of Patent: August 23, 2016
    Assignee: TDK CORPORATION
    Inventors: Tomokazu Ishikura, Michihiro Muramoto, Akihiro Harada, Katsumi Kawasaki, Tomofumi Kuroda
  • MAGNETIC MATERIAL FOR ANTENNAS, ANTENNA, AND WIRELESS COMMUNICATION DEVICE
    Publication number: 20120229354
    Abstract: A magnetic material for antennas including: an M-type hexagonal ferrite represented by the following general formula (1) as a main phase, MA.Fe12-x.MBx.O19 (wherein MA is at least one kind selected from the group consisting of Sr and Ba, MB is MC or MD, MC is at least one kind selected from the group consisting of Al, Cr, Sc and In, MD is an equivalent mixture of at least one kind selected from the group consisting of Ti, Sn and Zr and at least one kind selected from the group consisting of Ni, Zn, Mn, Mg, Cu and Co, X is a number from 1 to 5), and an average crystal particle diameter is equal to or greater than 5 ?m.
    Type: Application
    Filed: January 17, 2012
    Publication date: September 13, 2012
    Applicant: TDK CORPORATION
    Inventors: Tomokazu ISHIKURA, Michihiro MURAMOTO, Akihiro HARADA, Katsumi KAWASAKI, Tomofumi KURODA